Heavy Duty Needle Roller Bearings (Machined)

201312922541555906Machined Type Heavy Duty Needle Roller Bearings are bearings with a low sectional height and large load ratings. The outer ring has high rigidity and can easily be used even for light alloy housings. These bearings are available in metric series and inch series, both of which have the caged type and the full complement type. It is therefore possible to select a suitable bearing for use under various conditions such as heavy loads and high-speed or low-speed rotations. In addition, there are bearings with and without an inner ring. As the type without inner ring uses a shaft as the raceway surface, a compact design is possible.

Design Attributes

High-strength cage retains and guides rollers
High speed and lubrication-retention capability. A lubrication groove and hole in the O.D. facilitate relubrication through the outer ring.
Bearings can be used with or without a machined and ground inner ring depending on the suitability of the shaft as a raceway surface.

Applications
Gear pumps
Sheaves
Automotive transmissions
Two-cycle engines

  For shaft diameter
in mm
Features
 NK 5 – 110 light series
 NKS 20 – 75 heavy series
 RNA49 14 – 160 dimension series 49, to DIN 617/ISO 1206
 RNA48 120 – 415 dimension series 48, to DIN 617/ISO 1206
 RNA69 16 – 110 dimension series 69
RNA49..-RSR 14 – 58 dimension series 49, lip seal on one side
 RNA49..-2RSR 14 – 58 dimension series 49, lip seals on both sides
 NKI 5 – 100 light series
 NKIS 15 – 65 heavy series
 NA49 10 – 140 dimension series 49, to DIN 617/ISO 1206
 NA48 110 – 380 dimension series 48, to DIN 617/ISO 1206
 NA69 12 – 95 dimension series 69
 NA49..-RSR 10 – 50 dimension series 49, lip seal on one side
 NA49..-2RSR 10 – 50 dimension series 49, lip seals on both sides
 NAO 6 – 90 without ribs
 NAO..-ZW-ASR1 25 – 30 without ribs, double row
 RNAO 5 – 100 without ribs
 RNAO..-ZW-ASR1 18 – 60 without ribs, double row
 NCS 5/8 ” – 4 1/2 “ machined raceway to ABMA 18.2 – 1982, inch sizes

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